The Mayflower Bocawina National Park had a documentary made about it. While it seems to jump around between the topics, it's still worth a watch, especially if you want to learn more about the place that holds the longest zipline in Central America.

"Explore the wonders of the Mayflower Bocawina National Park in this documentary film! The Mayflower Bocawina National Park was filmed from May to August 2013 by Duarte Dellarole for his Ecotourism BSc. degree internship. The goal was to promote the most recent National Park in Belize and show how Ecotourism plays a fundamental role in the conservation of protected areas. The film you are about to watch shows the work that Mama Noots Bocawina has been developing in the area, the activities that they offer in the park and information on the wildlife and plants that can be found in this protected area."